The following points should be paid attention to when using the clamp ammeter:
1. When measuring on the high-voltage circuit, it is forbidden to use wires to connect the clamp ammeter to the meter for measurement. When measuring the current of each phase of the high-voltage cable, the distance between the cable ends should be more than 300mm, and the insulation should be good, and the measurement can only be carried out when it is considered convenient.
2. When observing the timing of the watch, special attention should be paid to maintaining a safe distance between the head and the live part. The distance between any part of the human body and the live body should not be less than the entire length of the clamp watch.
3. When measuring the current of low-voltage fusible fuses or horizontally arranged low-voltage busbars, the fusible fuses or busbars of each phase should be protected and isolated with insulating materials before measurement to avoid interphase short circuit
4. Pay attention to the voltage level of the clamp ammeter when using a high-voltage clamp ammeter, and it is strictly forbidden to use a low-voltage clamp meter to measure the current of the high-voltage circuit. When measuring with a high-voltage clamp meter, it should be operated by two people. Non-duty personnel should also fill in the second work ticket when measuring. They should wear insulating gloves when measuring, stand on insulating mats, and do not touch other equipment to prevent short circuit or grounding.
5. Pull the switch to the maximum range after the measurement of the clamp ammeter to avoid accidental overcurrent during the next use; and it should be stored in a dry room
6. When one phase of the cable is grounded, it is strictly forbidden to measure. Prevent personal safety from being punctured and exploded due to the low insulation level of the cable head.
7. When the clamp meter is measuring, the current of the nearby wires will also affect it, so it is also necessary to pay attention to the equal position of the three-phase wires.
8. Do not operate with electricity during maintenance to prevent electric shock.
In addition, the following issues should be paid attention to when using the clamp ammeter:
1. Choose the appropriate range gear, you cannot use a small range gear to measure large currents, if the measured current is small, you can wind the current-carrying wire a few more times and put it into the jaws for measurement, but the reading should be divided by the winding coil After the number is the actual current value. After the measurement, the mediation switch should be placed in the maximum range position (or closed position) for safe use next time.
2. Do not switch the range gear during the measurement.
3. Note that the voltage on the circuit should be lower than the rated value of the clamp meter, and the clamp ammeter cannot be used to measure the current of the high-voltage circuit, otherwise, accidents or electric shock may be easily caused.
